A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is:
. | A train 125 m long passes a man, running at 5 km/hr in the same direction in which the train is going, in 10 seconds. The speed of the train is: | |||||||
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Answer: Option B
Explanation:
Speed of the train relative to man = | 125 | ||
10 |
= | 25 | ||
2 |
= | 25 | x | 18 | ||
2 | 5 |
= 45 km/hr.
Let the speed of the train be x km/hr. Then, relative speed = (x - 5) km/hr.
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